pstore: add vmalloc error check

If vmalloc fails, make write_pmsg return -ENOMEM.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/pstore/pmsg.c b/fs/pstore/pmsg.c
index feb5dd2948b4..5a2f05a16c1e 100644
--- a/fs/pstore/pmsg.c
+++ b/fs/pstore/pmsg.c
@@ -37,6 +37,8 @@ static ssize_t write_pmsg(struct file *file, const char __user *buf,
         if (buffer_size > PMSG_MAX_BOUNCE_BUFFER_SIZE)
                 buffer_size = PMSG_MAX_BOUNCE_BUFFER_SIZE;
         buffer = vmalloc(buffer_size);
+        if (!buffer)
+                return -ENOMEM;
 
         mutex_lock(&pmsg_lock);
         for (i = 0; i < count; ) {